It is an application for iphone.
The first camera is a contour extraction camera. The one with the dark background can be extracted.
In the middle you can save the saved photos in Notepad, etc, with pdf and png.
The second camera can measure the approximate base, height, etc.
Length is the unit of display in centimeters and meters of Japan.
Blue and red circle labels try length and angle.
You can draw a line by tapping one by one and moving the second a little.